Quick-adjustable pipe-cutter.



J. H. VINTON.

QUICK ADJUSTABLE PIPE CUTTER.

APPLICATION FILED JUNE 30, 1911.

1,012,304; Patented Dec. 19,1911.

COLUMBIA PLANoanAPN cu. WASHINGTON. u. c.

UNITED STATES PATENT OFFICE.

JOHN H. VINTON, OF JAMAICA PLAIN, MASSACHUSETTS, ASSIGNOB TO TRIMONTMAN- UFACTURING COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OFMAINE.

QUICK-ADJUSTABLE PIPE-CUTTER.

To all whom it may concern:

Be it known that I, JOHN H. VINTON, a citizen of the United States,residing at Jamaica Plain, county of Suffolk, State of Massachusetts,have invented an Improvement in Quick-Adjustable PipeCutters, of whichthe following description, in connection with the accompanying drawing,is a specification, like characters on the drawing representing likeparts.

This invention relates to a pipe cutter or a device for cutting metalpipe. In this type of device the cutting is performed by small rotaryknives or cutters placed respectively on a fixed and a movable part.These parts are moved with respect to each other by means of a screw tobring the cutters gradually closer together until the pipe is severed.Owing to the character of material being cut this requires acomparatively fine or close threaded screw, and a consequent slowmovement of the parts toward or from each other. This renders the pipecutter unsuitable for use in cutting different sizes of pipe, which varyseveral inches in extreme diameter, because of the time required toadjust the parts to the required size.

In the construction illustrated herein embodying my present invention anabutment is slidably mounted on the main aw shank, and I have providedmeans to lock fixedly the abutment to the main jaw at desired points,and a cooperating jaw provided with cutting means is pivotally mountedon the abutment independently of the locking means thereof and isadapted to swing toward and from the main jaw, means being provided foradjusting the angular position of such cooperating jaw about its pivotalaxis and forcing it toward the main jaw when the abutment is locked frommovement. This construction enables the cuttercarrying parts to bequickly and readily set apartto approximate the diameter of the usual orrequired pipe sizes, and then when the abutment is locked the angularposition of the cooperating jaw is slowly adjusted and the cutting meansthereon is forcibly moved toward the main jaw as the cutting progresses.

The nature of the invention will appear more fully from the accompanyingdescription and drawings, and will be particularly pointed out in theappended claims.

Specification of Letters Patent.

Application filed June 30, 1911.

Serial No. 636,221.

The drawings illustrate a preferred form of pipe cutter embodying theinvention.

In the drawings Figure 1 is a side elevation of the pipe cutter withcertain of the parts shown in longitudinal cross section. Fig. 2 is across section taken on the line X-X of Fig. 1. I

The device comprises in carrying out this invention, three main parts, arelatively fixed part or main jaw 1, a relatively movable part orcooperating jaw 2, and a relatively movable abutment 3.

In the form shown the main jaw 1 is curved at its end to enable it toembrace the largest required size of pipe, and has journaled in itsextreme end a pair of rotary cutter knives 4. The jaw is of sufficientwidth so that it is recessed as indicated at 40 to form a housing forthe major portion of the rotary cutting knives. The main jaw extendsfrom the curved end into a straight shank portion 5, and as herein shownthe walls of the housing 40 are continued into separate dependingflangesfiO, so that the strength of the main jaw member is secured witha less depth of flange than would he required it but one flange wereused. The straight shank portion at its upper edge is provided withstraight ribs or ways 6.

The movable abutment 3, is provided with a base portion 13, whichstraddles the ways (3 on the shank of the jaw 1, and is provided withgrooves fitting said ways. A large, preferably cylindrical, stud 14: ismounted to slide freely on this abutment and transversely, or at rightangles to the plane of the ways 6. A pin 15 is connected to the stud 14and extends out through a slot in the abutment to the outside thereof,and a suitable sprin such as the leaf spring 16, is mounted in a cavityon the inside of the abutment and presses against the head of the stud 11 normally to project the stud toward the shank 5 of the jaw 1. Thisshank is provided with a row of holes 17 longitudinally thereof, adaptedto receive the end of the stud, and these holes are spaced at suitabledistances apart to correspond to the general variations in differentsizes of pipe.

The abutment3 is formed to present a hollow sleeve portion 18 whichreceives the handle 12. This handle is provided with a cross bar 19 andis shown as a cylindrical rod having a central screw-threaded section20. A

Patented Dec. 19, 1911.

screw-threaded nut 22 fits the screw-threaded portion 20,'is seated in arecess in the abutment 3, and straddles the web 23 thereof, whereby itis prevented from turning so that upon turning the handle 12 its end 50is projected more or less beyond the abutment.

The movable or cotiperating jaw 2 is formed as a yoke-shaped member, thelegs 52 of the yoke straddling the base of the abutment and beingpivotedat 53 to projections 54 from the base of the abutment extendingbeneath the ways 6 and forwardly toward the curved jaw. Thiscotiperating jaw member 2 is also recessed at its upper end as indicatedat 55 to present a housing within which is pivotally mounted arotarycutter knife 9. The pivot 53 of the jaw member 2 is ofiset aconsiderable distance from the longitudinal axis of the handle 12. Theopposite face of the jaw member 2 is curved as shown at 56 and the end50 of the handle is also curved, and these curved portions remain incontact during all positions to which the coiiperating aw member 2 isadj usted about its pivots during the operation of cutting the pipe.

It will thus be seen that in order to ad just the cutting knife 9 towardand from the cutter knives t the stud 15 is raised and the abutment slidalong the shank 5 until the cutter knives are separated approximatelythe diameter of the pipe to be cut, when the stud 14 is dropped into oneof the holes 17 thus locking the abutment firmly in adjusted position.Then to adjust the movable or cotiperating jaw member 2 with its rotarycutting knife 9 toward the main jaw, it is only necessary to turn thehandle 12 when the cotiperating jaw member 2 will be swung about itspivot 53, and the cutting means on said jaw member will be forced intothe pipe deeper and deeper as the cutting progresses.

The pipe cutter as thus constructed is of a very strong construction,and is of a compact form. It may be used for a large variety of sizes ofpipe, and the adjustment for the cutting operation is secured with greataccuracy.

In the construction described the parts t are referred to as rotarycutting knives, and may be of such construction. These members may alsobe constructed as rolls which press down the burs formed by the rotarycutting knife 9.

The invention having been described, what is claimed as new and desiredto be secured by Letters Patent, is:

1. A pipe cutter comprising a main jaw, an abutment movable thereon,means for fixedly locking the abutment to the main aw at desired points,a cooperating jaw provided with cutting means and pivotally mounted onsaid abutment independent of the locking means therefor and adapted toswing toward and from the main jaw, and means for adjusting the angularposition of the coperating jaw about its pivotal axis and forcing ittoward the main jaw when the abutment is locked from movement.

2. A pipe cutter comprising a main jaw having a straight shank, anabutment, movable longitudinally upon the shank, means for locking theabutment fixedly to the main jaw shank at desired points, a cotiperatingjaw provided with cutting meansand pivotally mounted on said abutment toswing toward and from the main jaw, and a rotatable, longitudinallymovable handle carried by the abutment and bearing against the free endof the coiiperating jaw, for adjusting the angular position of the saidjaw about its pivotal axis on the abutment and forcibly moving thecutting means toward the main jaw when said abutment is locked.

3. A pipe cutter comprising a main jaw, an abutment slidably mounted onsaid main jaw, means for locking said abutment fixedly to the main jawat desired points, a cotiperating jaw provided with" cut-ting means andcarried by and pivotally mounted on said abutment independent of thelocking means therefor and adapted to swing toward and from the main jawcutting means, and means carried by said abutment for adjusting theangular position of the co5perating jaw about its pivotal axis andforcing the cutting means on said jaw toward the main jaw.

4. A pipe cutter comprising a main jaw having a straight shank providedwith ways on said shank, means mounted wholly on said abutment to lockit to said shank at desired points, a cooperating jaw independent of thelocking means, provided with cutting means and straddling said abutmentand said ways and pivotally connected to said abutment beneath saidways, and means carried by said abutment for adjusting the angularposition of the coiiperating jaw about its pivotal axis and forcing thecutting means toward the main jaw when the abutment is locked.

5. A pipe cutter comprising a main jaw curved and recessed at its endsto present a housing, rotary members pivotally mounted in said housing,said jaw extended to present a straight shank, cutting means mounted tomove longitudinally on said shank towanel and from the rotary membersand also having a swinging movement, means tolock the said cutting meansfrom bodily movement while permitting swinging movement thereof, andindependent means ways, an abutment mounted to slide on said foreffecting a forcible swinging movement name to this specification, inthe presence of said cuttlng means toward the rotary of two subscriblngwitnesses. members, whlle the cutting means 13 locked JOHN H. VINTON.

Q from bodily movement longitudinally of the \Vitnesses: 5 shank. NATHANHEAR In testimony whereof, I have signed my FREDERICK S. (,hnncNLEAF.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

